Dust-separator.



G. L. PITTMAN & H. YOUNG.

DUST SEPARATOR.

APPLICATION FILED DEC. 30. 1915:

' Patented un 6,1916.

INZ NTORSL THE cuLumuA vLANocRAqfco WASHINGTON, n. c.

GEORGE L. PIT'IMAN AND HOMER YOUNG, OF BETHESDA, OHIO.

DUST-SEPABATOR.

Specification of Letters Patent.

Patented June 6, 1916.

Application fiIed December 30, 1915. Serial No. 69,351.

To all whom it may concern Be it known that we, GEORGE L. PITTMAN andHOMER YOUNG, citizens of the United States of America, and residents ofBethesda, county of Belmont, and State of Ohio, have invented certainnew and useful Improvements in Dust-Separators, of which the followingis a specification.

This invention relates broadly to dust separators, and more particularlyto a device which is designed primarily for removing the dust from thetobacco in scrap tobacco factories.

The chief object of the invention is to provide a simple and inexpensiveapparatus whereby the dust and fine particles of tobacco contained inthe scrap as the same leaves the stein-cleaning scrap machine areeffectually removed as the scrap tobacco is discharged from the conveyerleading from said machine to the drying room.

A further object is to provide a device of the character mentioned bymeans of which the separated dust is directed into a dust room or isconveyed to a point outside the building, thus not only providingagainst the air of the work-room becoming dustladen, a condition whichhas heretofore prevailed in scrap factories and which has been a sourceof much discomfort as well as great injury to the health of the workmenbut also obviating the objectionable intermixture of dust with thescrap.

With these and other objects in view, the invention resides in thefeatures of construction, arrangement of parts and combinations ofelements which will hereinafter be fully described, reference being hadto the accompanying drawings, in which Figure 1 is a top plan View ofthe invention; Fig. 2 is a longitudinal section of the same; Fig. 3 is apartial side elevation, enlarged; and Fig. 4 is a partial longitudinalsection of the casing, showing the curved ends of its side-walls, thescreen being shown removed.

Referring to said drawings, in which like designating charactersdistinguish like parts throughout the several views, 1 indicates aconveyer tube leading from the scrap-machine (not shown), through whichthe scrap tobacco is conveyed away from said machine under the impellingforce of air from a blower 2 which is suitably connected to said tube,said parts being of the usual form.

In the present instance, the tube 1 leads to the devicewhich-constitutes the present invention which is located within thedrying room. Said device comprises a casing A, substantially rectangularin cross section, having its under side open. The tube 1 has itsdischarge end somewhat flattened and flared laterally to form a nozzle 3having a long narrow throat 4, and it has said nozzle fitted into a slot5 provided therefor in the rear wall 6 of said casing adjacent to theupper edge of said wall. The front ends of the side walls 7 of saidcasing are for wardly and downwardly curved from their upper to theirlower edges, as shown at 8 in Fig. 4, to constitute a mounting for atransversely disposed screen 9 composed of fine wire mesh. A. transversecleat 10 has its ends attached to said curved ends of the casing walls 7adjacent to the lower edges of the latter, and the lower edge of thescreen is interposed between said casing ends and said cleat, the latterserving to firmly hold said screen in place and also to form an abutmentfor the rear end of the lower wall of a downwardly inclined dust chute11 which extends forward from said screen and opensthrough' a wall 12 ofthe building into a dust room or other suitable place. The rear ends ofthe side walls 13 of said chute extend back and lie against the outerfaces of the side walls 7 of the casing A, as

shown.

Located within the casing slightly below the level of the slot 5 is ahorizontal transversely disposed plate 14 the rear edge of which seatsagainst the casing wall 6 and the front edge of which lies somewhatrearward with respect to the screen, there being thus formed betweensaid front edge and said screen a somewhat restricted space or passage00 through which scrap tobacco proj ected from the nozzle 3 against saidscreen may gravitate to the floor of the room or to a receptacle locatedon the floor.

Impelled forward by the blast from the blower 2, the scrap tobacco,together with the dust contained therein, is discharged from the nozzle3 and is directed against the screen 9 with considerable force, saidtobacco thence gravitating to the dryingroom floor through the passagebetween the screen and the front edge of the plate 14, while theparticles of dust carried in suspension by the blast pass through thescreen and into the chute 11, from the mouth of which they aredischarged at a point outside said room. In practice, the air isdirected forward with such force that practically none thereof passesdownward with the tobacco, and, consequently, practically no dust ispermitted to escape intothe drying room.

It is advantageous to employ a pivoted deflector 15 within the casing bymeans of which the blast may be deflected upward at an angle toward thetop of the screen, as when the tobacco is of a heavy grade, thussomewhat retarding the discharge of the tobacco through the casing andfacilitating the removal of the dust. Said deflector is fixed at itsrear edge upon a rod or shaft 16 which is pivotally mounted in the walls7 adjacent to the under edge of the slot 5 in the wall 6. Said deflectoris provided with means whereby it may be held in adjusted position. Saidmeans may be of any preferred character, that shown in the presentembodiment consisting of a downturned spring arm 17 provided atone endof the rod 16, which arm is movable over the uneven face of a notchedsegment 18 carried by the outer face of one wall 7 What is claimedis- 1. A dust separator of the character described comprising, incombination with a conveyer tube, a casing having an entrance openingthrough which said tube discharges, an inclined dust chute fixed to theforward end of said casing and leading forward therefrom, the capacityof said chute gradually increasing toward the discharge end thereof, ascreen disposed across the mouth of said chute, and a plate disposedwithin said casing below said entrance opening and terminating rearwardof said screen to form an opening therebetween through which screenedmaterial may drop unobstructedly.

2. A dust separator of the character described comprising, incombination with a conveyer tube, a casing having an entrance openingthrough which said tube discharges, a dust chute having its receivingend fixed to the forward end of said casing and leading forwardtherefrom, said receiving end having greater'capacity than the dischargeend of said casing and the capacity of said chute being graduallyincreased from its receiving end to its discharge end for affording anunobstructed passage for dust-laden air therethrough, and a screendisposed across said receiving end of said chute, the bottom of saidcasing terminating rearward of said screen to form a passage forscreened material therebetween.

3. A dust separator of the character described comprising, incombination with a conveyer tube, a casing having an entrance openingthrough which said tube discharges, an inclined dust chute fixed to theforward end of said casing and leading forward therefrom, the capacityof said chute gradually increasing toward the discharge end thereof, ascreen disposed across the mouth of said chute, a plate disposed withinsaid casing below said entrance opening and terminating rearward of saidscreen to form an opening therebetween through which screened materialmay drop unobstructedly, and an adjustable deflector plate mounted oversaid first-mentioned plate whereby material to be screened may bedirected toward the upper part of the mouth of said chute. In testimonywhereof we aflix our signatures in presence of two witnesses.

GEORGE L. PITTMAN. HOMER YOUNG. Witnesses J. WV. PETERMAN, W. D. BoLoN.

series or this patent may be obtained for five cents each, by addressingthe Commissioner of satenta.

Washington, D. 0.

